[GitHub] [calcite] danny0405 commented on a change in pull request #1271: [CALCITE-3112]Support Window in RelToSqlConverter

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danny0405 commented on a change in pull request #1271: [CALCITE-3112]Support Window in RelToSqlConverter
URL: https://github.com/apache/calcite/pull/1271#discussion_r305208638
 
 

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 File path: core/src/test/java/org/apache/calcite/rel/rel2sql/RelToSqlConverterTest.java
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 @@ -3472,6 +3542,14 @@ private void checkLiteral2(String expression, String expected) {
       this.config = config;
     }
 
+    /**
+     *  Open the test for converting a {@code Window} to sql.
+     */
+    Sql includeWindow(boolean includeWindow) {
+      this.window = includeWindow;
+      return this;
 
 Review comment:
   Why we need a flag here, shouldn't support window be a default behavior ?

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